# What is the surface area of this right rectangular prism with dimensions of 5 centimeters by 5 centimeters by 12 centimeters?

The formula I like to use is    A = 2(LW + H(L+W)) For your dimensions, this is    A = 2((5 cm)(5 cm) + (12 cm)(5 cm + 5 cm))    A = 2(25 cm² + 120 cm²)    A = 290 cm² The surface area of your right rectangular prism is 290 cm².

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